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Finding the Fourth Proportional to 20,996,896.50, 28,975,717.56 and 11,339,104.50

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Solution

The fourth proportional to 20,996,896.50, 28,975,717.56 and 11,339,104.50 is: 15,647,964.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,996,896.50 : 28,975,717.56 = 11,339,104.50 : x
  2. Step 2: Convert to fraction form
    20,996,896.50/28,975,717.56 = 11,339,104.50/x
  3. Step 3: Cross multiply
    20,996,896.50x = 28,975,717.56 × 11,339,104.50
  4. Step 4: Simplify right side
    20,996,896.50x = 328,558,689,375,325
  5. Step 5: Solve for x
    x = 328,558,689,375,325/20,996,896.50
  6. Step 6: Final answer
    x = 15,647,964.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.